US885378A - Treadle mechanism for shoe-sewing machines. - Google Patents

Description

Noa 885,378. y PATENTED APR.21, 1908. E. P. RICHARDSON.

TREADLE MECHANISM FOR SHOE SEWING MACHINES.

ARPLIOATION FILED MAR. 27. 1905.

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f5. 6 Jw N0. 885,378. PATBNTED PR.21, 1908, E. P. RICHARDSON. TREADLE MBCHANISM FOR SHOE SEWING MACHINES. APPLICATION FILED MAR. 27, 1905.

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E. P. RICHARDSON.

TRBADLE MBGHANISM FOR SHOE SEWING MACHINES.

APPLICATION FILED MAF.. 27, 1905.

vNQJNSNNWN. PATENTND APR. 21, 1908. B. P. RICHARDSON. TRBADLE MBGHANISM PoR sHoN SEWING MACHINES.

APPLICATION FILED MAE.27, 1905.

Uivrrim sfrariiss rarinaa cierren.

EVERETT P. 'RICHARDSON OF LWRENVE, MASSAlllSE'llS, ASSIGNOR TO RICHARDSON SHOE MA OHINERY COMPANY, Olr

BOSTON. MSSUU USETTS, A VORPORATlON OF MlNE.

TREALE MECHANISM FOR SHOE-SEWING MACHINES.

Nessasvs Specification of Letters Patent.

Patented April 21, 1908.

Application iiled March 27, 1905. Serial No. 252,128.

To all whom it may conce-rn.'

Be 1t known that l, Eviimir'r P. RICHARD- sON, of Lawrence, in the county of Essex and State of Massachusettshave invented cei'- y .tain new and useful improvements in Treadle inr` which the sewing mechanism is adapted to be driven at either of two speeds, means being manually controlled by the operator by which the mechanism may be driven at either of `two speeds at will. Said atents z also show a presser-foot with mechanism for locking thepresser-foot in operative position in combination with a stop mechanism for the power shaft, and means whereby when the stop-motion is actuated to stop the machine, the presser-foetus' automatically released, so that it may inanuallylraised by the operator. According to the present invention, l accomplish substantially7 the samev ends, but provide a simpler, more compact, and more durable mechanism and reduce the number of parts used inlmy previous'machine. In said patentsl provided two manually operatable -treadles, one for controlling the sto p-motioii and thc 1ywo-speed mechanism, and the other for aisiiig the presserfoot. yAlthough theI vtwo treadles were arranged a slight distanceapart, yet it' was necessary in my machine for the operator to move his foot from one tr`eadle to the other in o erating the machine. In the presenty mac xine, however, l have reduced Athe number of vtreadlcs to one, andi:` have provided mechanism by means of which it may be caused to raisc the presser-foot and to control the stop-mechanism and also the twospeed mechanism. i

Referring .tofthe accompanying drawings, whichillustrate one embodiment of the inventibia-#Figure l represents a portion of a not differ from that 'illustrated in my features are similar to those illustrated in my said atents, but which is provided with the nove mechanism which forms the subjectmattei' of the present invention. ln this igure the standard is shown as broken away. Fig. 2 represents a section on the line 22 of Fig. l. Fig. 3 represents a section through thc pulleys which are mounted upon tie cmintershaft. Fig'. ll represents a section on thc line -t---i of Fig. 1. Fig'. 5 represents a section on the line 5 5 of Fig. 1, and illustrates the trcadlc as being engaged with the i'od which controls the stop-motion andthe two-speed mechanism. Fig. 6 re rescnts a similar section and shows the tread e engaged with the mechanism by means of which the presser-foot is raised. Fig. 7 represents a section on the line 7-7 -ot' Fig. 5. Fig. 8 represents a section on the lino 8 8 of Fig. 6. Figs. 9 and motion mechanism being sections on the 10 illustrate a portion of the stop lines 9--0 of Fig. 1. Fig. ll is a perspective view of the trcadlc and some ot the parts controlled thereby. f

Referring to thc accompanying drawingsl indicates the standard having a suitable base 2. The machine has the usual rotatable horn 4 and suitable stitch-forming or sewing mechanism, the details of which can be obtained from the Letters Patent hereinbefore referred to: The head comprises the base-plate 3 and the uprights 6 and 7, in which is journaled the power or needle-driving shaft 8. l

(lindicatcs the resser-foot, and 6l the bar which carries it. Tlie pin 7 2 is located between two shoulders on the presser-toot bar and projects forwardly from an larm 73, which -is rigidly secured to shaft 7 4, journaled in bearings afforded by` the uprights of the head. A spring 7'5 is coiled about the shaft 74 with one end secured to a collar 76 aliix'ed to the shaft by 'a set-screw 77, and with the other end resting against the top of thc bed-plate 3, said sprinpf normally holding the presserfoo t downward, so as to rest upon the shoe on the horn. The arm 73 has a ro'ection 78 in the path of a lever 70, centra lv ulcrumed upon a screw S0 'passed into the bed-plate 3.

As thus far described, the mechanism does said` patents, and it will be observed that have used the same numerals in designating the McKay sewing machine in which the general l parts as wer'e therein used.

I will now proceed to describe the novel features which form the subect-matter of the present invention.

Referring to Fig. l, it will be seen that loosely pivoted upon a stud 1n() supported by the base 2 is a treadle 11, the forward end of which is formed to receive the foot of the operator. rlhis treadle is adapted to be moved both vertically and horizontally,the aperture through .which the stud 1() lpasses being large enough to permit the said ate'ral movement. The treadle is held norinall raised by a spring 12, the lower end of which is attached to the treadle and the upper end of which is attached to an arm 13 secured to a bracket 14 which is shown in Fig. 1 as being bolted to the standard 1. The treadle ils rovided with a stud 15, (see Figs. 5 am 6) ada tedl to engage a projection 16 on a yoke 17, ulcruined at 18 on screws passed into the standard 1. The yoke has an arm 19'which is pivoted to the lower end of a rod 20, the upper end of which is pivoted to the lever 79 as shown in Fig. 2.

Vhen the operator stands in front of the.

machine, he may throw the treadle 11 to the left, as shown in 6, and by then depressing it, may draw down the rod 20 and swing the lever 79 about its fulcrum to raise the presser-foot. The treadle- 11 is also provided with an offset portion 21 which carries a plate 22. This plate is ada ted to be moved into aline-nient with a' co ar 23 on a rod 24 which is 'passed throughthe bracket 14. The plate 22 and the stud 15 are so located with respect to each other and to the projection 16 and the collar 23 that when the treadle is moved to the position in Fig. 5, the stud 15 will be disengaged from the projection 16 and the plate 22 will be caused t-o register with the collar 23.so that by depressing the treadle when it is in the position shown in Fig. 5, the rod 24 will be depressed or drawn downward for a purpose -to beexplained. It may bc stated.l that the rod 24 1s normally held in a raised position by a spring 25 which encircles it, one end of the spring bearing against the bracket14 and the other against a collar 26 adjustably secured to the rod, as shown in Figs. 7 and 8. The rod 24 controls the stop-mechanism and the two-speed mechanism which will -now be explained.

Referring to Fi s. 1 and 2, itA will be observed that upon t e needle or ower shaft 8 there'are two loose pulleys or rivers 30 and 31 of diferentdiameters, the pulley 30 being relatively small and driven at a lugh speed, and the pulley 31 being relativel large, and driven at a slow speed. The pu ley 31 has an elongated hub 32 which is mounted to revolve loosely upon the shaft 8.A The pulley 30 has its hub 33 mounted to rotate upon the hub 32.

Fixed upon the shaft 30, to rotate therewith, 1s a brake-wheel 34.

The wheel clutched together.

scema 34 and the pulley 31 have complemental clutching faces which are frusto-conical, as shown, so that by moving the pulley 3'1 to the right, it may be clutched to the wheel 34 to drive the shaft 8 at a relativel slow s eed, and the pulley' 31 and the pu ley 30 complemental clutching faces so. that by moving both pulleys to the ri ht, the wheel 34, the pulley 31, and the pul ey 30 may be all caused to rotate in unison to drive the shaft 8 at a predetermined high s eed. The two pulleys 30 and 31 receive t eir power from two endless belts or bands 35 36, to which power is imparted through pulleys 37 38 on a countershaft 39. is located conveniently above the machine if desired. The larger pulley 37 is illustrated as pinned to the shaft 39 and it has an elongated hub 40. Between the pulley 38 and the hub 40 is placed a Horton ratchet clutch, so called, or an 1 other suitablform of clutch, so that the pulliey 38 may run faster than the pulley 37 but cannot run slower.

In Fig. 4, the clutch mechanism is conventionally shown as comprising a ring 41, upon which the hub of the pulley 38 is keyed. On the hub 40 is keyed a collar 42. The ring 41 is provided with sockets to receive rolls 43; The sockets are wedge-shaped so that when the pulley 38 is rotating in the direction of the arrow, more rapidly than the pulley 37, the rollsare inactive, this occurring when the needle-bar is rotated at a high s eed, as .when the pulleys 30 and 31 and the w eel 34 are all When the slow-s eed pulley 31 is clutched to the wheel 34, an the igh-speed pulley 30 is running loose, the rotation of the shaft 39 in the-direction of the arrow in Fig. 4 wedges the rolls against the ring 41and causes the pulley 3 8 to be driven synchronously with the shaft 39.

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On theI projectin end of the shaft 8 is a I collar 44 which is a 4apted to engage the end of the hub 32 which projects beyond the end 'by a pivot 48 eitending from anarrn 49 of a bell-crank lever.v This bell-crank leven is fulcrumed upon avstud 50 projecting from a bracket 51- on thestandard, and it'has an arm 52 which projects underneath an'adjustable collar 53 on the rod 24. A spring 120 is coiled about the axis of the fulcrum 50, one end being securedv to the arm 52 and the other end to the bracket 51', the function of this spring being to maintain the arm 52 in an elevated' position arid clamp the brakeband subsequently described about the brake-wheel. I

A-.rod 54 projects laterally from the arm 49 through an aperture in the arm 46 and' is pro- Vvided on its end with adjustable lock nuts 55 56, .between which and the arm 46 is placed/a spring 57. Now it will be observed that by into frictionul engagement with `the pulley,

drawing the rod 24 downward, s short distance, so as to rock the hell-crunk about ils fulcrum, the roll 45 will he caused to yieldingly move the hub 32 und the pulley 31 into frictionel engagement with the wheel 311, so es to cause the needle or power shaft 8 to he driven at a relatively low speed, so long es the foot of the operator continuously depresses the trendle 11. For the purpose, however, of'ceusing the needle driving shaft 8 to he driven et a higlr( speed, it will he observed that the pulley has near its huh a let face 59, and that journaled on the end of the arm 49 is a coller 58. Hence b still further depressing the foot tresdle 11 t ie bell-crank may be moved still further about its fulcrum to cause the roller 58 to force the pulley 30 31, the increased tension of the spring 57 maintaining the pulley 31 in rictionel engagement with the wheel 311-. When the parts are in this osition, with the pulleys 30 and 31 and the w eel 34 all clutched together,

the shaft 8 will bedriven at e. predetermined" high speed, the driving pulle 38 now 1unnin loose and being s 'eededy ahead of the pul ey 37. So long as t ie operator continues to depress the treedle to its lowest point, the sewing mechanism will be driven et e. higher speed.

I will now explain the stop-motion by which, upon releasing the treedle, the mechanism will be stopped with the needle-bar raised and with the presser-foot releesed.

Loosely encircling' the brake-wheel 34 is u "bund-brake 100. One end -o the `bendupright 7 brake is attached to spin 101,'secured to the The other end of the hund-brake is secured to e pin 102, which is attached to e connecting rod 103, the lower end of which is pivoted to the bell-crunk erm 52. This connecting rod 103 is formed in two teleseoping parts, and is longitudinally expensible en( contractile, and having u' set-screw 104 for rigidly securing the two telescoping parts together. When the rod 24 is depressed to swing the bell-crank erm 52 downward, the connecting-rod 103 is drawnA downward so es vto .loosen the brake-bend 100 around the wheel 34,but when the suid erm 52 moves upward, the` brake-bend is immediately drawn taut uhout said wheel to stop the operation of the sewing mechanism. Tothe upper end of the connectin rod 103 is secured u stop 105 which, when tie connecting rod is r drawn downward, is caused by e sprmg 106 to slip under it stationery abutment 107 on the upright 7. Hence when the treedle 11 is depressed to cause the low-speed pulley to he clutched to the power shaft 8, the coller 53 forces downward the erm 52, which draws downwerd the connecting rod 103 to loosen the brake-bend and to permit the stop 105 to slip under and engage the abutment 107. The pulley will thus be clutched' to the shaft so long :is the connecting rod remains in this` position, which is shown in Fig. 10.

ln order to unclutch the pulley from the shaft und to cause the hruhe-bnnd to nutomuticully engage the broke-wheel 34, so as to stop the sewing mechanism et u point when Ithe needle-bnr is raised und the presser-foot is unlocked, l provide the following devices p Upon the end of the rod 24 .is u linger 110 which is bent nt its end to project by the edge of the connecting rod 103. This linger forms e trip to disenguge the stop 105 from the abutment 107. Pivoted to the upright 7 is s feeler 111,. rlhis feeler has en inclined fece 112, which is adapted to beengnged once during each revolution of the brake-wheel by n pin 113 carried hy'said brake-wheel. The feeler is held in position to he engaged hy said pin by u'spring 114, interiigosed etween it end the abutment 107. 1e movement of the feeler when engegedby the pin is so slight that it 'wil-l not impinge upon the connecting rod 103 but whenl the finger or trip 110 is permitted by the operator to rise to e. point shown in Fig. 9, so es .to lie between the feeler und the connecting rod, the outward movement of the l'eeler, when impined upon b the pin113, will move the ssii trip and t 1e connecting rod 103 to the left, to disengsge the stop 105 from the :ibutment 107 end permit seid connecting rod to rise, whereupon the brake-band will immedist'ely eiect e cessation of rotation of the brake-wheel end consequently of the shaft 8. So lonfr es the operator maintains u pressure upon 131e treudle,-the trip 110 will be in innctive position, but us soon ns he removes his foot from the treedle or relieves the treadle from pressure, the rod 24 will rise to carry the trip into uctivcposition, so thut when the brake-wheel reaches e predetermined point in its rotation, the pin 113 will through the feeler 111 disengnJ e the stop 105 from Ithe abutment 107, as (escrihed. To prevent n. failure ot' the spring I114 to operate, thehrukewheel carries another pin 115 nt u 0renter radial distance from the unis of tetinff at e predetermined speed, and that the two pulleys 30 und 31 are therefore `being driven at e. relatively highspeed andra relatively low s eed, and thatthe power shaft 8 is at rest, t e operator places u shoe in the machine end depresses the`ioot tresdle '11 fer enough to clutch the low-speed pulley tc the shaft 8. 'As he does so, the connecting rod 103 is Amoved downward to permit the stop `105 to engage the abutment 107 :mld re'- fio' ` on tne rod .24.

main there locked with the brake-band released from the brake-wheel. The power shaft will now be driven at a slow speed, so long as the operator continues his pressure upon the treadle. lt should be stated that, before the operator depressed the treadle, he moved it to the position shown in Fig. 5, so that 'the plate 22 could engage the collar 23 lf the operator desires that the sewing be now accomplished at a high speed, he depresses the treadle still further to i and drops the rod 1 03, so that the brake` band immediately clamps the brake-wheel and stops the rotation of the shaft S, from which the low speed pulley is now released.

From the foregoing description of the machine and the operation thereof, it will be apparent to those skilled in the art to which the invention relates, that said invention possesses numerous advantages. The location of the drivers and the clutch mechanism on the head of the machine enables the ma-.

chine to be operated with a single flat belt from the overhead shaft, thereby reducing the danger to the operatives that is attendant upon the employment of a plurality of rap- 1( ly moving beltsfdriven from the-overhead shaft. The machine therefore takes less floor space and may be made more compact than where the clutch mechanism is located at the base of the machine. Again the utilization of asingle treadle adapted to raise the presserfoot and control the stop\`motion and two speed mechanism greatly reduces the number of parts in the machine and reduces the labor of the operative.

Having thus explained fthe nature of the invention, and described a way of constructing and using the same, although without attempting to set forth all of the fborms in which it may be made, or all of the modes of its use, l declare that what l claim is l. A sewing machine having a power or needle drivingr shaft in the head thereof, drivers loose on said shaft and actuated at different s eeds and manually operated means for c utching said drivers to said shaft to cause it to be rotated at either of two different speeds.

2. A sewing machine havin f a power or needle-,drivin shaft in the head thereof, differently Spee ed drivers loose on said shaft,

essere :clutching means interposed between said drivers and said shaft, and manually operated means for controlling said clutching means to cause said shaft to be rotated by either of said differently speeded drivers.

3. The combination with a shaft rotatable at a predetermined speed and two pulleys of different diameters therein, of a sewing machine having a power or needle driving shaft in the head thereof, two ulleys loose on said last-mentioned shaft and) s eeds by said first-mentioned pulleys, and c utching means for clutching to the needledriving shaft to rotate it either of the pulleys thereon.

4. The combination with a shaft rotatable at a predetermined speed and a sewing machine having a power shaft in the head thereof, of two pairs of complemental pulleys on said shafts, belts connecting the pulleys of each pair, said ulleys being of such diameter that one pu ey on the ower shaft is rotated at a high speed and t e other at a low speed, and the pulleys on the power shaft being loose thereon, and manually controlled clutch-mechanism between the last-mentioned ulleys and the power-shaft for caussaid3 shaftvto be driven by either of the pulleys thereon at will.

5. The combination with a shaft rotatable at a predetermined speed and a sewing ma- .chine having a power shaft, of two pairs of driven at dierent complementalpulle s on said fshafts, belts V connecting the pu eys of each pair, said pulleys being of such diameter that one pulley on the power shaft is rotated at a igh speed and the other at a low speed, and the pulleys on the power shaft being loose thereonymanuall controlled clutch mechanisrn between t e last-mentioned pulleys and the power shaft for causing said shaft to'be driven by -either of the pulleys thereon at will, and stop-mechanism for automatically stopping the rotation of said power shaft when both pulleys are released therefrom.,

6. The combination with 'a driving shaft rotatable at a predetermined speed, and a sewing machine having in its head a ower shaft, of two pairs of pulle s on said s afts, of belts connecting the ul eys of each pair, said pulleys being of suc diameter that one pulle on the power shaft is driven at a high spec and the other ata low speed, one oft e thereon, and means for clutching one or both of said last-mentioned pulleys to said power shaft.

7. A sewing machine having a power or needle driving shaft, two differently speeded drivers loose thereon, a stop-motion for said shaft, clutch mechanism for causing said shaft to be driven by said pulleys at different o eration of both the stop-motion and the -c utch-mechanism.

8. A sewing machine having a power or l`needle driving shaft, two differently speeded drivers loose thereon, complemental clutch members on said drivers, complemental members on one of said; drivers and said shaft, and manually operated means for causing said last-mentioned clutch members to be engagedto effect the rotation of said shaft at one speed, and while so engaged to cause the lclutch-.members on said drivers to be engaged to effect the rotation of the shaft at another speed.

9. A sewing machine having a power shaft, differently speeded drivers loose thereon, clutch mechanism for causing the shaft to be driven at either of two different speeds by said drivers, an automatic stopping device for said shaft, a treadle, and connections between said treadle, said clutch-mechanism and said stoppingdevice to cause the stoppingdevice to release the'shaft and to clutch the low-speed driver te the shaft upon the initial depression of the lever, to clutch the high-speed driver to the shaft upon a further depression of the treadle, and upon a release of the treadle to cause the unclutching of said drivers from the shaft"and permit the stopping device to operate to stop the shaft. 10. A sewing machine havin a power shaft, differently speeded drivers lgoose thereon, clutching means iorcausin the shaft to be driven at either of two di erent-speeds by said drivers, a lever and vconnections be* tween said clutching means and said lever to cause said shaft to be driven b the low speed drivervupon the first art o a movement of said lever in one irection and to cause said shaft to be driven by the high speed'driver on a further movement of said lever in the same direction.

the driver to the needle-driving shaft, means for operating said clutch, Vand a treadle pivoted to swing up and down' and laterally and constructed and arranged to be engaged i.

with either of said means at will for operating them.

12. A sewing machine comprisin stitcln forming mechanism, a clutch contro ling the operation of said mechanism, mechanism for operating the clutch, a presser-foot, mechanism for lifting said presser-foot, said clutchoperating mechanism and said presser-foot lifting mechanism having projections o r engaginf" portions, and a treadle having its frontbdndl free, said treadle being movable laterally and thereby adapted to be sepa-` rately engaged with said projections or engaging portions.

13. A sewing machine comprising a needle-driving shaft, a presser-foot, mechanism for lifting the presser-foot, two speed driving mechanism, mechanismfor connecting the two speed driving mechanism to the needledrivinr shaft, and a treadle fulcrumcd to swing aterally and up and down so as to be operatively engaved with either of said mechanisms at will for effecting its operation.

14. In a sewing machine, stitch-forming mechanism includmg a clutch, clutch-operating mechanism, a presser-foot, presser-footlifting mechanism, each of said mechanisms comprising a rod havin and a laterally movab adapted to be engaged wit engaging portions.

, 15. VA sewing machine comprising sewing mechanism,- presser-foot-lifting mechanism, driving mechanism, means for connecting the driving mechanism with the sewing mechanism, a treadle disconnected from said presser-foot-lifting mechanism, and said connecting means, and ada ted to operatively engage with eitherA o them at will, and a fulcrum for the rear end of said treadle adapted to permit lateral movement of said treadle.

In testimony whereof I have afiixed my signature, in presence of two witnesses.

EVERETT P. RICHARDSON.

`Witnessesz M. B. MAY, C. C. STECHER.

e de )ressible treadle either of said an engagiiw portion,

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